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Annuals or biennials.  Fibrous-rooted from a caudex.  Hairs of the mid-stem are long and spreading (var. septentrionalis), or short and appressed (var. strigosus).  Typical height is from 2 to 3+ feet.

Inflorescences are usually flat- to rounded-topped, often with numerous ascending branches.

Flower heads are radiateRay florets are white, pistillate and fertile. Disc florets are yellow, bisexual and fertile.  Involucres are hemispheric.  Involucral bracts are approximately equal in length, the surfaces beset with spreading or appressed hairs, flattened (var. septentrionalis) or round in cross-section (var. strigosus).

Basal leaves may be persistent at flowering.  Stem leaves are linear, lanceolate or oblanceolate, toothed or untoothed, becoming smaller upward.

Plants of fields, roadsides, open disturbed areas.  Flowers June to July.  Native.  Two varieties are present in our area:

E. strigosus Muhl. ex Willd. var. septentrionalis (Fernald & Wiegand) Fernald.
E. strigosus Muhl. ex Willd. var. strigosus

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Similar species:  Erigeron philadelphicus and E. annuusE. strigosus is often a bit shorter and smaller than "typical" E. annuus, and with stem leaves that are a bit narrower, shorter and less conspicuously toothed than those of E. annuus.  Considering that the usual habitats for the two species are the same, it would seem that the differences are not entirely due to growing conditions.

 

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